* Remove openssl and related code that previous commits by John Marino
replaced with libressl. Remove build hooks, base now only uses libressl.

* Remove crypto/openssl. This has been replaced by the openssl
implementation from ressl.

* Remove lib/libcrypto. This has been replaced by lib/librecrypto which
generates a private_crypo library only used by base.

* Remove lib/libssl. This has been replaced by lib/libressl which
generates a private_ssl library only used by base.

* NOTE: In addition, John has been working on updating dports to ensure
that only the ports-based libssl and libcrypto (both nominally
implemented via ressl and not openssl), and that dports packages
no longer have any chance of using the private versions of these
libraries from base.